Please can you tell me why the system that automatically assigns numbers to uploaded papers seems to be missing out numbers more and more. In our journal, I have sort of noticed it has happened for ages, and put it down to maybe aborted attempts to upload by authors, but when I began looking into it recently, this is happening much more frequently in recent months. For example, the paper uploaded yesterday was 203, and the previous paper to that was 201 and before that it was 199, 198, 197 and then 194, missing two numbers out, and so on. I can't discern any pattern. As far as I know, every paper uploaded is always visible to Editors, but what could be causing these gaps in the numbers? It means that any statistical analysis has become meaningless also!